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 Post subject: Case Study for WD10EAVS-00D7B0
PostPosted: November 6th, 2018, 20:47 
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Joined: September 17th, 2016, 16:06
Posts: 74
Location: India
Hi, this is a short case study for the said drive.
The drive had come in an external enclosure with USB FIREWIRE extension board 4061-705016 having Oxford Semiconductor controller
The PCB that the drive had is 2060-701537-004 REV A

The drive suffered a PCB failure and had masked rom.
the following steps were executed

1)Procured an identical board
2)Downloaded the rom code from HDD surgery. I had no clue for the microcode, hence had to near match the S/N to take a wild guess.
3)The drive SPUN up with the donor rom and SA was accessed and all modules were backed up. Drive IDed here, scanning was slow, poor microjogs or poorly matched 47 was doubted.
4)ROM was regenerated.
5)The generated ROM was patched.
6)The Drive IDed correctly.
7)Relo was cleared.
8)Slow Read Fix was done.
9)Drive had all its heads working and was imaged using DeepSpar

All data was recovered as drive was having working heads but it clicked a few times before it detected indicating partial failure.

Any way some one can lead me to identify the MAGIC RESISTORS so that the protocol can be switched over from masked rom to external U12 Chip?

Thanks.
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 Post subject: Re: Case Study for WD10EAVS-00D7B0
PostPosted: November 6th, 2018, 22:31 
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Joined: December 8th, 2010, 11:37
Posts: 579
Location: Ottawa, Canada
Well done, @sin! Thanks for sharing. For the resistors question, see the "WD Royl PCB Resurrection" post by @pcdiag in DFL's user forum.

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Sabo Computer Repairs & Data Recovery


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 Post subject: Re: Case Study for WD10EAVS-00D7B0
PostPosted: November 7th, 2018, 8:52 
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Joined: September 17th, 2016, 16:06
Posts: 74
Location: India
Thankyou @LarrySabo

thanks for the link.

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